Brace-chuck.



I. C. IMBODEN.

BRAGE CHUCK.

APPLICATION FILED JULY 11, 1906. BBNEWLD APR. 13, 1910.

Patented June 21, 1910.

wi [$11 use:

FFICE- ISAAC C. IMBODEN, OF CLEONA, PENNSYLVANIA.

' manon-CHUCK.

Speoieation of Letters Patent.

Patented J une 21, 1910.

Application led .Tuly 11, 1906, Serial No. 825,725. Renewed April 18, 1910. Serial No. 555,296.

l To all 'whom 'it concern:

Y brace chuck, the object of the invention being to provide a device that may be secured in an ordinary brace in the usual manner -and in which drills or other like tools hav-4 ing Shanks of varied diameters may be held by securing themin sleeves of corresponding internal diameters which sleeves are held inA the chuck. The construction is such that even the broken endof a drill ma be securely held in position ando erate The invention is more fu y .described in the following specifications and clearly illustrates in the accompanying drawing, in w ic Figure 1 is a central sectional view of my device. Fi 2 is a detail view of the hollow set screw. igs. 3 and 4 show slightly modiiied forms of the device. Figs. 5 and 6 showl modified forms of the sleeve.

The numeral 1 desi ates the chuck, which is made with a centra longitudinal opening 2 and a right angled internally screwthreaded opening in the wall thereof leading into said longitudinal opening. e

The numeral 4 designates a sleeve adapted to fit into theopening 2. This sleeve is which it may be engaged with a suitable wrench. With this set screw in position there is no projection be ond the surface of the chuck when the dril is secured therein.

When it is desired `tosecure a drill in the v chuck, the sleeve whose lon itudinal opening corresponds with the iamet'er of the drill to be used is placed in the chuck with its side opening 7 registering with the opening 2 in the wall of the chuck. rIhe set screw is then inserted and it passes through both the wall of the chuck and sleeve and struction insures the the openings 7 and 3 or the set screw and -cating with said longitudinal bears against the shank of the drill, securely holding it therein.

AIn Fig. 3 I have shown the to edge of the chuck formed with a slot or epression 9 and the sleeve with a lug 10 on its `upper edge adapted to engage the slot. This conroper registering of prevents accidental turning in the chuck.

In Fig. 4 I have shown the sleeve with a collar 11 having a de ression therein, 12. The top edge of the c uck in this case is formed with a projection 13 adapted to engage said depression, for the same purpose as described in connection with the construe-- tion shown in Fig. 3.

In Fig. 5 I have shown a s lit sleeve, to facilitate its easy removal an in Fig. 6 I have shown itwith a hexagonal outer sur'- face. This latter construction will also insure the proper registering of the side openings and revent turning in the chuck.

It is evident that with my chuck a number of sleeves may be used each having a different internal diameter adapted to hold drills of different sizes. that the broken end of a drill may be held therein, if there is but enough to project beyond the edge of the chuck to be of use. It is evident also that my device may be used to hold tools other than drills and that it may be used in a drill press as well as a hand brace.

The chuck may if desired be made with a round shank and the sleeves may be tapered if desired instead of straight as shown, without departing from the spirit of the invention.

Having thus fully described my invention and its construction, what I claim and desire to secure-by Letters Patent is A brace chuck comprising a chuck bodyv perforated longitudinally at one end andv aving a socket at its other end communierforation, and a drill-holding sleeve fitting in said socket closed at one end to prevent acci- It is also evident dental slipping of the tool during operation.

In testimony whereof I aiix my signature, inpresence of two subscribing witnesses.

ISAAC C. IMBODEN.

' Witnesses:

' J. S. ULRICH, I-I. G. LIGHT. 

